title: [6-(Furan-2-yl)-7-nitro-2,3,4,6,7,8-hexa-hydro-1H-pyrido[1,2-a]pyrimidin-9-yl](phen-yl)methanone.
abstract: The asymmetric unit of the title compound, C19H19N3O4, contains two mol-ecules with very few conformational differences; a C atom in the pyrimidine ring in one of the mol-ecules is disordered in a 0.688 (15):0.312 (15) ratio. In both mol-ecules, the fused pyridine and pyrimidine rings adopt half-chair conformations. The dihedral angles between the furan and benzene rings are 81.00 (13) and 84.99 (10)° in the two mol-ecules. The mol-ecular structure is consolidated by intra-molecular N-H⋯O hydrogen bonding. In the crystal, C-H⋯O hydrogen bonds connect the molecules into a three-dimensional network.
authors.affiliation: College of Chemistry and Chemical Engineering, Jiang Xi Normal University, Nanchang, Jiang Xi 330022, People's Republic of China.
authors.forename: Wen-Feng
authors.initials: WF
authors.lastname: Zhang
authors.forename: Jian-Hui
authors.initials: JH
authors.lastname: Xia
authors.forename: Zhao-Hui
authors.initials: ZH
authors.lastname: Xu
authors.forename: Li-Ben
authors.initials: LB
authors.lastname: Wang
authors.forename: Chu-Yi
authors.initials: CY
authors.lastname: Yu